Re: NANFA-- FW: larval bluegill survival (fwd)

Bruce Stallsmith (
Thu, 20 Apr 2000 09:20:26 EDT

There was a paper in the journal American Midland Naturalist by R.R. Werner
in the mid-70s about following the movements of newly free-swimming bluegill
larvae in a lake in Indiana. What he found was that for the first 3 weeks or
so of larval existence, the larvae moved to the middle of the lake and moved
up and down in the water column--coming up to the surface at night to feed,
apparently, and then moving down to about 4-5 meters deep during the day and
apparently avoiding being eaten themselves. This implies that there was
something small and free-swimming at the surface at night that was a
preferred food item; as I remember Werner wasn't able to tease out
identifiable material from the larval guts. I know I have this paper in my
files somewhere, it was always one of my faves... and now Werner is at SUNY
Syracuse, the Environmental Sciences school.

--Bruce Stallsmith
Huntsville, AL

>From: "R. W. Wolff" <>
>To: <>
>Subject: Re: NANFA-- FW: larval bluegill survival (fwd)
>Date: Wed, 19 Apr 2000 22:09:06 -0700
> I have used green water,and the orange spots were eating it, evindent of
>their black bellies. Then, they died. I was thinking there may be another
>thing needed, since they come from cloudy water often, where most other
>species are usually in clearer water??? This would not explain the
>bluegills though, they are commonly found in very clear ( sterile) water.

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